PHYS 2020 Exam 2 Review

Which of the following correctly describes an electric charge?

• A property that only exists in conductors

• A fundamental property of matter that can be positive or negative

• A quantity that depends on an object's mass

• A force between particles in motion

Tags

NGSS.HS-PS1-1

NGSS.HS-PS3-5

According to Coulomb's Law, the electric force between two point charges:

• Increases as the square of the distance increases

• Is independent of the distance

• Decreases as the square of the distance increases

• Is zero for unlike charges

Tags

NGSS.HS-PS2-4

What is the SI unit of electric charge?

• Volt (V)

• Joule (J)

• Coulomb (C)

• Ampere (A)

Which statement correctly defines the electric field (E)?

• A scalar quantity describing how much charge is on an object

• A vector field representing the force per unit charge at a point in space

• A field that exists only near negative charges

• The potential energy of an electric charge

Tags

NGSS.HS-PS3-5

Electric field lines always move toward a...

• positive charge

• negative charge

• neutral charge

The electric field strength at a point decreases when

• the source charge increases

• the distance from the charge decreases

• the distance from the charge increases

• the test charge decreases

The superposition principle states that:

• Electric fields from multiple charges can be added vectorially

• Electric forces cancel each other automatically

• Electric field lines never interact

• Each charge produces the same field regardless of others

Tags

NGSS.HS-PS2-4

What is the variable for charge?

• q/Q

• C

• V

• A

Tags

NGSS.HS-PS2-4

The work-energy theorem states:

• Work equals mass times velocity

• The net work done on a system equals the change in its kinetic energy

• The total energy is always zero

• Potential energy cannot change

The electric force is a conservative force because:

• It depends on the path taken

• Work done is always positive

• Work done depends only on initial and final positions

• It produces heat

Tags

NGSS.HS-PS2-4